Motor-driven sewing machine



Jan. 6. 1925.

' F. DBEHL MOTOR nmvm: srawme MACHINE Filed Aug. 24, 192:.-v

2 Sheets-Sheet 1 INVENTOR 3 7 M W-Q ATTQRNEY F. DIEHL MOTOR DRIVEN SEWING MACHINE Jan. 6. 1 925,

Filed 'Aug. 24, 1921 2 Sheets-Sheet 2 ///////////////v////////I/ flV/Wfi W 1 ..I M

INVENTOR ATTORNEY Poicei'iieel join. 6,

EEJEEERZCZI DIEHL, G1 .ELZZilBETE. NEW

3331 l AQSIIGNGR T5 T E SHEGER EAHU- FACTUBING COMPANY OF ELIZABETH JIEQE'E, A. UGRBO'EAT (31 moor EFIACHIFQ' Application August 2%, H921. Serial 2'30. filE/filfi.

Sewing Machines, of which the following is ii specifica-cion, reference being had therein to the accompanying drawings.

This invencion relates to moeor driven sewing machine outfits and has for so oojecc to provide such anoutlit With ll concealed motor drive which will require minimum of attention to keep ii: in prop c1. operative condition.

Another object of the lDVQJ lQH is to pro Vldfi a sewing machine out??? with a concealed motor drive occupying a minimum of space below the sewing machine baseplate, whereby the sewing lieail may be in stalled in either liancl carrying case or drop-head cabinet ofminimum size and capacity. I

Furthei" objects of the invention will aypeai' as the description proceeds.

In the present embo elimcnli of this in- Vention, the sewing machine base-plate which the top openingin the usual drop head cabinet 0! ii the hollow base n1emoer of a hand-can yingz case, has mounted thereon a sewing head of a. Well known type having a raised cloth-pla3e below level of which is mounted the main sewing machine shaft. The drivingmoi oi" is pro? crobly of the Well known type having a. flattened frame and is mounted on a. lim secured to the uncle!) side of the bcsoplaic. The motor is connected to the meinslmft of the sewing machine by means of a. bell. which runs over grooved pulleys on (he motor and sewing machine shafts onai also runs over a grooved idler pulley m the encl of a spring pressed idler arm secured to the motor lil'zicket. A n oizoi' controller of the knee-shift type, disclosed in the patent to lllzutin Hemlch, No. 1,444,917 of Feb. 13, 1923 is also preferably incorporated in the outfit when the sewing head is installed in the hollow base member 01 the caiiiyino' case. This controller is situated alongside the space occupied by the motor, time effecting u very compact and cificient arrangement. All wiring is concealed and protected with in the hollow base member and there are no exposecl pertsfwhicli are iilcciy {to get out of order.

Sn cocoons of toe compzicl, arrangement of the concealed H'IOlJOi chive, the sewing head may also he installed in (hop-head cabinet, he cavity of which is of minimum Widili "from fVQTIl) to bee ii; a. minimum clearance in of the usual hinge pins being necessary.

lilie accom m ying cli'miings, F 1 is a side eleva'lion, parly iii section, of o ing machine outfit embodying the inven' tic-o. 11 2 is top plan View of the hollow nose member of she carrying case. Witl. the motor and controller in choir respective positions within she some. Fig:- 3 is e sec- Lion on thc'line 33, F 2, with the sowmachine heed superposed thereon. 4 is a section on the line fe-asi Fie.

is a section on the line 5 5, Fi 5?- eto-ci Fig. a sectional Viewof them tor showing-3 the fizz *tcnccl frame ci'insiruction.

In the en'ibocliment of the invention cl'iosen for the purposes of the present disclosure, 1 represents the lioliow base member of the usual sewing machine carrying case, the open top sicle of which base member is closed by oose-plate 2 the usual hinge-pm connections 3 plane a oomplcce sewing heed comprising :1 peclesizil 5, 1"2il5(.(l clotlbpleifie 6, bracket-arm '4, needle 8 pressci'dooi; 9 and foul-(flog 10. The main-shaft ll of the sewing machine may mounted below thc level of oils clothl ie and o rotary cliain-stii-ch. loopei 'ihc nol'oi: 13 preferably has a flattened field f1 use, the oppositely disposed faces 13 of which are in pai'allelisiii with the bose-plzite 2; a screw connection 1% being made with. he inclined liizicli'ei 15 which is secured by screh's 16 to the mickeiiecl 1.? :ii the under side-of. the home-plate. It is not necessary that the inotor-l'izm'ie have oppos tely disposed let feces so long as ils field i .fame. is fiottcnocl iii lhe sense that it is of greater width than height and is in a general sense mounted in substantial porch "zelism with the base-plate; ic. with ifs nmximom widtlnvise dimension subsiuntiaL ly horizontal.

rectangular troller to off position,

' screw. is the spring-pressed arm 21, carrying the idler pulley 22, the spring 23 tending to swing the arm 21 downwardly, Fig.

iigand maintain a certain tension on the belt 2a which runs over the pulleys 19, 22 and the'large pulley 25 on the sewing machine shaft 11. v

A motor controller, preferably of the knee-shift: type, having the constructive featuresdisclosed in said Hemleb application, may bemounted Within the hollow base 1 so asto, occupy'spajce alongside the space taken up by the motor 13; Such a.

controllercomprises an iron box 26 enclosing the resistance unit 27 including the usual resistor-connectedcontact points 28 and the swinging contact arm 29 having a groove 30,-wh1ch receivesthe pin 31 depending from the arm 32 pivoted at 33 to the box 26. The arm 32 is formed with an aperture 3% which receives the upper end of the arm. rigi with the rocloshaft 36 journaled in the box 26 and having an outboard projection 37 to which is detachably secured the upper end 38 of a knee-shift 39. The spring 40 restores the con Fig. 2, when pressure of theknee against the lever 39 is re lieved. l

A partition 41 divides the base 1 into two compartments 42. and48, within the latter of which the motor and controller are housed. The compartment 42 may be used a receptacle for sewing machine attachments,

1 ,aanaoa spoolsof thread, or other'accessories, which are thus protected against being soiled or vdamaged by contact with the motor or other machine parts.

controller, asincorpo'rated in the portable case, are entirely concealed within the hollow base. 1', and that the outfit may be set up for use on an ordinary table without in any way mutilating the latter.

Having thus set forth the nature of the invention, What I claim herein is =The combination with the usual hollow rectangular base of a sewing ,machine hand- 'carrying case having a "fiat bottom adapting 'it to restfor useupon an ordinary table, of a flat plate removably closing the top opening in said base, a sewing head having a frame casting formed with a pedestal mounted on the upper side of said flat plate, said sewing head also having a cloth-plate raised abovethe level of the bottom of said.

pedestal and a main-shad disposed below the level of the cloth-plate, a motor mounted im the under side of said flat plate within the cavity of said hollow base and having a frame flattened lit-opposite sides and disposed With'its flat sides substantially parallel to and closely adjacent said plate and,

the v bottom of the base of said carrying case, respectively, and va driving connection bej t-ween said motor and said main-shaft.

In testimony whereof, I have signed my name to this specification.

{ FREDERICK DIEHL. 

